Ubuntu: How to ENABLE touchpad tap-to-click while typing? Configuration keeps resetting every few seconds

Question:

I want to (temporarily) disable the feature that disables touchpad tap-to-click while I am typing on my keyboard to be able to play games that require simultaneous interaction via mouse and keyboard without having to use a physical external mouse.

In other words, how can I use my touchpad to click things while pressing keys on the keyboard at the same time?

Everything I could find on Ask Ubuntu so far was the opposite, how to disable the touchpad while typing.

Some system info, I am running Ubuntu 16.04 and xinput lists my touchpad as